Spray coating composition



Patented July 10, 1945 SPRAY COATING COMPOSITION Charles H. Clinton,Milwaukee, Wis., assignor to Spray Wax Sales 00.. Milwaukee, Wis., acorporation of Wisconsin No Drawing. Application January 1, 1944, SerialNo. 516,736

2 Claims.

The present invention relates in general to improvements in the art ofprotectively coating diverse elements, and relates more specifically tothe manufacture or production of wax or similar material for coatingrelatively smooth surfaces.

The primary object of my invention is to provide an improved wax productor the like, having embodied therein a, visible indicator for clear- 1ydefining the coated area to which the product has been applied.

While it has heretofore been proposed to expedite the application ofvarious kinds of wax to diverse surfaces, by spraying thecoatingmaterial upon these surfaces; it has been extremely dimcult toapply coatings of uniform thickness with the prior spray methods becauseof the fact that the wax products heretofore available were not adaptedto clearly and visibly indicate the actual areas coated by the spray.Spray wax is delivered from a nozzle in liquid form and should bedeposited upon the surfaces which are to be coated, in relatively thinlayers, and if uniform thickness of these layers when applied toextensive and relatively smooth surfaces. is desired. it is necessary toavoid excessive overlapping of the adjacent spray deposits. Inorderto'eliminate such overlapping of the spray deposits, the

individual applying the wax must have some visible indication as to theextent of the successive and adjoining coated zones, because the waxitself is ordinarily transparent and dries very quickly. I havediscovered that by embodying a suitable indicator directly within theliquid wax and by properly proportioning the indicator to the rema ningingredients of the mixture. a thin layer of fine visible dust may becaused to appear upon the surface of the wax coating immediately afterthe successive coating deposits become dry, and since such drying actionis very rapid, undesirable overlap of adjoining deposits can be readilyavoided and uniform application of the coatings is assured.

It is therefore a more specific object of the present invention toprovide an improved spray wax containing a suitable indicator which willpromptly appear upon the wax coated surfaces so as to permit theindividual applying the wax to constantly and promptly determine theextent of the coated areas.

Another specific object of this invention is to provide an improvedspray coating composition having embodied directly therein anindicatingsubstance which will promptly crystallize and appear in the form of athin layer of fine dust,

whenever the composition is deposited in the form of a thin film and ispermitted to dry.

These and other specific objects and advantages of my invention will beapparent from the following detailed description, and whileI havespecifically referred to the new composition as a wax product, theprovision of a visible indicator embodied in proper proportions directlywithin spray coating substance is the gist of my invention, and it isnot my desire or intent to unnecessarily restrict the scope or utilityof the im-' provement by the use of specific terms.

My improved composition consists primarily of a mixture containingcoating substances such as carnauba, paraffin and bees wax, liquids suchas naphtha and water, and an indicator such as boron of the type adaptedto crystallize into fine dust formation when dry, mixed in properproportions so as to provide a liquid emulsion adapted to be sprayedupon diverse surfaces.

In preparing the improved composition in accordance with the presentinvention, I prefer to utilize the several ingredients in approximatelythe following proportions, namely, below nine per cent by weight of theseveral wax ingredients, below nine-tenths of one per cent of theindicator, above sixty per cent of naphtha or other quick drying agent.and the remainder of water or other inert liquid. If the three types ofwax specifically mentioned are utilized the percentage of each shouldnot exceed three per cent, and the percentage of bees wax shouldpreferably be slightly less than that of the others. These variousingredients should be thoroughly mixed and maintained in liquidcondition subject to immediate use, and by limiting the quantity of eachof the ingredients of the proportions specified, uniform coating of highlustre and transparency may be produced and a visible indication or dustlayer of pronounced visibility may be rapidly obtained.

When utilizing the improved emulsion or wax product to spray coat asurface, the surface to be coated should first be properly cleaned andall grease and other foreign deposits should be removed. The cleanedsurface should then be polished and dried to obtain maximum lustre, andthe fluent wax product should be well shaken or agitated in order toinsure thorough mixing of the ingredients. The emulsion may thereafterbe sprayed upon the surface with a suitable spray gun and in thepresence of compressed air, so as to deposit successive and adjoiningcoated areas or zones. As these deposits are made, the naptha, or otherdrying agent used, quickly evap- Jrates the free liquid and causes thewax to adhere to the surface while the indicator crystallizes and isdeposited uniformly upon the wax coating in the form of a thin layer ofvisible dust. This dust may subsequently be brushed oil of the hardenedand transparent wax coating thus leaving a brilliant and effectiveprotective coating upon the surface.

From the foregoing detailed description it will be apparent that mypresent invention provides an improved spray coating composition whichis adapted when applied, to promptly give a visible indication of theextent of the coated area without detrimentally affecting the appearanceof the final coatings. The improvement is moreover especially applicableto spray wax products for protectively coating air, land and watervehicles, and by properly proportioning the various ingredients in amanner substantially as herein defined, uniform and highly efiicientcoatings or protective layers may be rapidly and continuously applied tovarious surfaces with the greatest of ease. The improved product hasproven of great commercial value in various industries, and can bemanufactured and sold at relatively moderate cost.

It should be understood that it is not desired to limit this inventionto the exact ingredients or to the precise proportions of ingredientsherein mentioned or described, for various modifications within thescope of the appended claims may occur to persons skilled in the art.

I claim:

1. A spray coating composition, comprising, approximately nine parts byweight of mixed carnauba, paramn and bees wax, approximately sixty partsof naptha, approximately thirty parts of water, and the remainder ofboron of the type adapted to separate from the composition as fine dustwhen dried, the total parts of said composition constituting one hundredparts,

2. A spray coating composition, comprising,

' approximately three parts by weight of camauba wax, approximatelythree parts of parailln, approximately three parts of bees wax,approximately sixty parts of naptha, approximately thirty parts ofwater, and the remainder of boron oi the type adapted to separate fromthe composition as fine dust when dried, the total parts of saidcomposition constituting one hundred parts.

CHARLES H. CLINTON.

